C'tan Phase Weaponry

A class of weapons known as C'tan Phase Weapons are also thought to utilize living metal. These are usually potent close combat weapons but when they come into contact with the necrodermis of a C'tan (forged from Living Metal), they are sucked from the hands of their wielder as if the C'tan is reabsorbing a part of its body.[1a]

Asirnoth

It has been theorized that Asirnoth, the Silver Wyrm whose melted skin coated The hands of Ferrus Manus is potentially a Necron construct, and thus his hands were coated with living metal; however there has been no confirmation of this.[Needs Citation]